use kirchoffs rule if applicable A common flashlight bulb is rated at 0.300 A and 2.90...
A common flashlight bulb is rated at 0.300 A and 2.90 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 1.10 Ω, what is the temperature of the filament, in degrees Celcius (degC), when the bulb is on? The filament is made of tungsten.
A common flashlight bulb is rated at 0.300 A and 2.70 V (the values of the current and voltage under operating conditions). If the resistance of the tungsten bulb filament at room temperature (20°C) is 2.20 Ω, what is the temperature of the filament when the bulb is on? My answers of 706.86 C is incorrect 9 = 2.2 *(1 + 0.0045(T- 20))
A small bulb is rated at 7.50 W when operated at 125 V. The tungsten filament has a temperature coefficient of resistivity alpha = 4.50 times 10^-3/C degree. When the filament is hot and glowing, its temperature is seven times room temperature (20 C degree). What is the resistance of the filament (in ohms) at room temperature?